Question

3.During the preparation of hydrogen chloride gas on a humid day, the gas is

usually passed through the guard tube containing calcium chloride. The role

of calcium chloride taken in the guard tube is to

(a) Absorb the evolved gas

(b) Moisten the gas

(c) Absorb moisture from the gas

(d) Absorb Cl– ions from the evolved gas​

Answer 1

Answer:

(c) absorb moisture from the gas. explanation : During the preparation of hydrogen chloride gas , the gas is usually passed through the guard tube containing calcium chloride , it is because calcium chloride is good drying agent. it helps to absorb moisture from the gas.

Answer 2

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Option (c) : absorb moisture from the gas.

On a humid day,

Calcium chloride is used as an absorbent in the guard tube while hydrogen chloride is being formed on a humid day as it can absorb the moisture present in the air. HCl corrosively reacts with water leading to the formation of hydrochloric acid as it is strongly acidic in nature. It gives out white fumes on reacting with moisture.